JPH1170292A - Drum type washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a bearing attached to an outer tank and a drum. SOLUTION: A backwardly open U-shaped notch 13b is formed in a mounting margin at the end of the arm 13a of a bearing, and the threaded part of a bolt 31 is threaded into its groove 13c with a nut 33 fitted around the inner periphery of the bolt 31 via a washer 34. When the bolt 31 and the nut 33 are tightened together, the washer 34 presses the notch 135, securing the bearing to an outer tank. Since the bearing has no through hole, it can be molded also by rapping in the one-dimensional direction. Therefore, the cost of molds is low and molding processes become simpler.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine for washing laundry by storing laundry in a cylindrical drum rotated about a horizontal axis, and more particularly, to assembling a drum and an outer tub. Regarding the structure.

[0002]

2. Description of the Related Art A drum-type washing machine has a drum provided rotatably around a horizontal axis in a cylindrical outer tub arranged substantially horizontally, and a door provided at an opening at a front end face of the outer tub. It is configured to be opened and store laundry in the drum. FIG.
Is a rear perspective view showing the entire structure of a general drum type washing machine, and FIG. 5 is a partial side sectional perspective view of the washing machine.

The overall structure will be described with reference to FIGS. An outer tank 6 having an open front is suspended by a vibration-proof spring 7 and a damper 8 inside an outer box constituted by the frame 1, the top plate 2, the front plate 3, the rear cover 4, and the legs 5. . The front plate 3 is provided with a door 9 for opening and closing the front opening of the outer tub 6, and the laundry is opened and the laundry 9 is stored in a drum 10 arranged in the outer tub 6. A fixed bearing 11 is firmly attached to the rear surface of the drum 10.
A large diameter main shaft 12 is fixed to 1. A bearing 13 is fixed to the rear surface of the outer tub 6.
4, the main shaft 12 is rotatably supported. Outer tub 6
A large pulley 15 is attached to the tip of the main shaft 12 protruding rearward of the main shaft 12. The rotational driving force of a motor 16 attached to the lower surface of the outer tub 6 is applied to the large pulley 15 via a small pulley 17 and a V belt 18. Is transmitted.

[0004] Water supplied from an external tap or the like through a water supply hose 19 is injected into the outer tub 6 through an injection port 20 provided with a valve or the like. The water inlet 20 is provided with a detergent storage box, and when the supplied water passes through the detergent box, the detergent is dissolved to form detergent water. A large number of water holes 10a are provided in the peripheral wall of the drum 10, and water supplied to the outer tub 6 flows into the drum 10 through the water holes 10a. The water dehydrated from the water is scattered to the outer tub 6 through the water holes 10a. A baffle 10b is provided on an inner peripheral wall of the drum 10 for scraping laundry at predetermined intervals. The water accumulated in the outer tub 6 is discharged to the outside through a drain hose 23 through a lint filter 22 that can be pulled out from the front by a driving force of a drain pump 21.

Since the drum 10 is supported only by the main shaft 12, when the drum 10 rotates with a large imbalance around the rotation axis, the fixed bearing 11 and the bearing 1
A large force acts on 3. For this reason, the fixed bearing 11 is attached to the drum 10 and the bearing 13 is attached to the outer tub 6 very firmly. For example, as shown in FIG. 4, the bearing 13 is mounted such that four arms extending from the center of rotation to four outer peripheral sides support the rear surface of the outer tub 6. The arm and the outer tub 6 are fixed at a portion indicated by E in addition to the vicinity of the axis center.

An example of a conventional structure of a mounting portion E between the outer tub 6 and the bearing 13 will be described with reference to FIG. FIG. 6 is an enlarged view of the mounting portion E, where (a) is a plan view seen from the back side,
(B) is a plan view as viewed from below, and (c) is a cross-sectional view taken along line D1-D2. The outer tub 6 has a side peripheral plate 6a forming a cylindrical body.
A circular rear face plate 6b whose outer peripheral end is bent substantially vertically is fitted to the inner periphery of the rear end portion, and the edge portions of the side peripheral plate 6a and the rear face plate 6b extending rearward are caulked by the caulking portion 30. It is fixed. As shown in FIG. 6 (c), the tip of the arm 13a of the bearing 13 is bent forward (in a direction approaching the rear plate 6b of the outer tub 6), and a bolt hole is formed substantially perpendicular to the side peripheral plate 6a. A thick mounting margin 13f is formed.
A thread groove to be screwed with the screw of the holding bolt 31 is cut in the inner periphery of the bolt hole. Side peripheral plate 6a and rear plate 6b
A hole is opened in the contact surface with the
The bearing 13 is fitted into the outer tub 6 so that the bolt hole 3f coincides with the bolt hole, and the holding bolt 31 is fixed to the side peripheral plate 6 via the abutment 32.
a and screwed into the bolt hole of the mounting margin 13f. Thus, the four arms 13 of the bearing 13
The tips of “a” are fixed to the outer tub 6 respectively.

[0007]

However, in the above-mentioned conventional mounting method, it is necessary to form the bearing 13 through a bolt hole and cut a thread groove on the inner peripheral surface thereof. For this reason, when the bearing 13 is molded by a mold, the bearing 13 is moved up and down (FIG. 6).
In (c), not only the die cutting in the left-right direction) but also the horizontal slide cutting process is required. Therefore, the mold itself becomes large and the cost increases. Further, the number of processing steps increases, so that the processing time also increases. On the other hand, when cutting bolt holes by post-processing, it is difficult to secure the positional accuracy of the holes,
Since the cutting process must be performed carefully, the processing time becomes longer. In any case, since the thread groove needs to be cut after forming the bolt hole, the processing time is further increased.

The method of attaching the fixed bearing 11 to the drum 10 is the same, and has the same problem.

SUMMARY OF THE INVENTION The present invention has been made to solve such problems, and an object of the present invention is to provide a drum type washing machine using a bearing mounting structure capable of shortening machining time and reducing cost. Is to provide.

[0010]

Means for Solving the Problems and Embodiments of the Invention According to a first aspect of the present invention, a horizontal shaft is fixed to a rear surface of a cylindrical drum, and an outer housing for mounting the drum is provided. In a drum type washing machine having a structure in which the horizontal shaft is rotatably supported by a bearing attached to a rear surface of a tub, a bearing member having an arm extending from the center of the shaft toward the outer periphery is fixed to the rear surface of the drum or the outer tub. A mounting structure, wherein a mounting margin having an opening at a predetermined position of a rear edge of a side peripheral plate extending rearward from a rear end surface of a drum or an outer tub is formed, while a mounting margin is formed at a distal end of an arm of a bearing member. Form a bearing mounting margin in contact with the inner periphery of the mounting margin, and form a notch open rearward at a position corresponding to the hole of the mounting margin in the bearing mounting margin; Through the hole from the outside of the plate Through a bolt in the cut, it is characterized in that it has secured the white bearing mounting and mounting Kido by tightening the screwed nut and the bolt in the bolt in the inner of the notch.

That is, a through hole is provided in the mounting margin on the outer tub (or drum) side, while a notch is provided in the bearing mounting margin at the tip of the arm of the bearing member instead of a through hole. For example, when mounting the bearing member on the outer tub, the bearing member is mounted on the rear surface of the outer tub so that the position of the hole of the outer tub mounting hole and the notch of the bearing mounting margin coincide with each other. Insert a bolt into the hole from the outside of the notch and project to the inside of the notch. A washer is passed through the thread portion of this bolt, and a nut is screwed. When the nut is tightened, the bearing mounting margin around the notch is pressed by the washer, and the outer tank mounting margin and the bearing mounting margin are fixed in close contact. Although the rear of the notch is open at the bearing mounting margin, when a force is applied to separate the bearing member from the outer tub, the threaded portion of the bolt and the nut abut against the closed bearing mounting margin. For this reason, the same robustness as the through hole can be ensured despite the notch.

Further, the bearing mounting margin is provided with a U-shaped first notch on the outermost periphery, a concave portion for accommodating a nut on the inner peripheral side, and a bolt protruding from the nut on the inner peripheral side. And a structure in which a second notch opened rearward is provided to support the screw portion. According to this, the washer and the nut can be easily attached to the screw portion of the bolt passed through the first notch, and the screw portion protruding from the nut is kept substantially vertical by the second notch. The tank and the bearing can be fixed without displacement.

According to a second aspect of the present invention, a horizontal shaft is fixed to a rear surface of a cylindrical drum, and the horizontal shaft is fixed by a bearing attached to a rear surface of an outer tank in which the drum is mounted. In a drum type washing machine having a structure for rotatably supporting a shaft, an attachment structure for fixing a bearing member having an arm extending from a shaft center toward an outer periphery to a rear surface of the drum or an outer tub, wherein the drum or the outer tub is provided. A mounting margin having an opening is formed at a predetermined position of a rear edge of a side peripheral plate extending rearward from a rear end surface of the side peripheral plate, and a bearing in contact with an inner periphery of the mounting margin is formed at a distal end of an arm of a bearing member. A mounting margin is formed, the bearing mounting margin is a U-shaped notch that opens forward at a position corresponding to the hole of the mounting margin, and the front of the notch is closed inside the notch and opened rearward. Having an upright wall, an outer tank or A bolt having the hole penetrated from the outside of the side peripheral plate of the ram was passed through the notch, and a nut for screwing to the bolt and a bolt were tightened between the nut inside the notch to fix the bearing mounting margin and the mounting margin. It is characterized by:

That is, in the drum type washing machine according to the second aspect of the present invention, the notch groove into which the screw portion of the bolt is inserted is opened forward in the bearing mounting margin. Further, an upright wall portion, which is continuous with the notch, is provided inside the notch, which closes the front side of the notch groove and opens backward. Therefore, for example, the threaded portion of the bolt inserted into the hole from the outside of the side peripheral plate of the outer tub first passes through the cutout groove opened forward, and then reaches the standing wall portion closed at the front and opened at the rear. A nut is screwed into the upright wall portion via a washer. When the nut is tightened, the bearing mounting margin around the notch is pressed by the washer, and the outer tank mounting margin and the bearing mounting margin are fixed in close contact.

[0015]

According to the bearing mounting structure of the drum type washing machine according to the first and second aspects of the present invention, it is not necessary to form a through-hole in the bearing member, so that the bearing member can be formed only in the vertical direction. Can be molded. Therefore, the cost of the mold can be reduced and the processing time can be reduced. Further, the tightening can be performed using a nut, and it is not necessary to cut a thread groove in the bearing member itself, so that the processing time can be further reduced as compared with the related art. As a result, assembling costs can be reduced, and a significant cost reduction can be achieved in total.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a bearing mounting structure in a drum type washing machine according to the first invention will be described below with reference to FIGS. 1A and 1B are enlarged views showing a mounting structure of a bearing according to the present embodiment, wherein FIG. 1A is a rear plan view, FIG. 1B is a bottom plan view, and FIG. 1C is a sectional view taken along line A1-A2. 2A and 2B are enlarged views showing the structure of the distal end of the arm 13a of the bearing 13, wherein FIG. 2A is a rear plan view, FIG.
(C) is a sectional view taken along line B1-B2.

In the outer tub 6, the rear edge of the side peripheral plate 6a extends rearward of the vertical surface of the rear plate 6b in the same manner as in the prior art. Are bent substantially vertically, and the edges are fixed by caulking portions 30.
A bolt hole that penetrates the side peripheral plate 6a and the rear plate 6b is formed on the contact surface of the rear plate 6b.

On the other hand, as shown in FIG.
Of the arm 13a is bent forward, and a mounting margin having a first notch 13b opened rearward is formed on the outer periphery thereof. The outermost notch groove 13c is substantially U-shaped, and the inner diameter of the arc portion of the notch groove 13c is slightly larger than the outer diameter of the screw portion of the bolt 31. A washer 3 is provided on the inner peripheral side of the first notch 13b.
A large recess 13d is formed on the inside (front) so that the nut 4 and the nut 33 can be accommodated. A second notch 13e opened rearward is formed for guiding.

When mounting the bearing 13 on the outer tub 6, the bearing 13 is first fitted into the rear face plate 6b of the outer tub so that the notch groove 13c matches the bolt hole of the outer tub 6, and the bearing 32
Then, the screw portion of the bolt 31 is inserted into the bolt hole. Since the screw portion of the bolt 31 passes through the cutout groove 13c, the concave portion 13
In d, the nut 33 is screwed through the washer 34 through the screw portion of the bolt 31. When the nut 33 is tightened with respect to the bolt 31, the washer 34 pressed by the nut 33 comes into close contact with the first cutout 13b (around the cutout groove 13c), and
The notch 13b and the outer tub 6 are fixed. The tip of the threaded portion projecting upward from the nut 33 enters the cutout groove of the second cutout 13e. After once tightening the nut 33 to the bolt 31,
When a force that tries to separate the bearing 13 from the outer tub 6 (a force that acts in the right direction in FIG. 1C) is applied, the nut 33 and the washer 34 contact the front wall surface of the recess 13d.
This prevents the bearing 13 from coming off.

Since the first and second cutouts 13b and 13e of the bearing 13 in this embodiment are open to the rear, the bearing 13 can be formed only by die-cutting in the left-right direction in FIG. It is. That is, it is not necessary to perform die cutting or drilling in the sliding direction as in the related art. Also, cutting of the thread groove is unnecessary.

Next, an embodiment of the bearing structure in the drum type washing machine according to the second invention will be described with reference to FIG. In this embodiment, the outermost first cutout 13b at the tip of the arm 13a of the bearing 13 is a U-shaped cutout that opens forward. The structure on the inner peripheral side of the first notch 13b is the same as that of the above embodiment. For this reason, as shown in FIG. 3B, when viewed from the bolt insertion surface side, the notch groove 13 of the first notch portion 13 b opened forward (downward in the figure).
c and the notch groove of the substantially V-shaped second notch 13e opened rearward (upward in the figure) overlap, so that the screw part of the bolt can be seen through the hole like a through hole. In such a structure, the first notch 13b and the second notch 13e
3 (c) can be formed by dies that are pulled out in the left and right directions, respectively. That is, in this embodiment as well, there is no need to remove the die in the sliding direction, which is conventionally required.

In the above description, the mounting of the bearing on the outer tub has been described. The same applies to the mounting of the fixed bearing on the drum. The above embodiment is merely an example, and it is apparent that modifications and modifications can be made as appropriate within the scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a diagram showing a mounting structure of a bearing according to an embodiment of a drum type washing machine of the first invention.

FIG. 2 is a diagram showing a structure of a bearing according to the embodiment.

FIG. 3 is a view showing the structure of a bearing according to an embodiment of the drum-type washing machine of the second invention.

FIG. 4 is a rear perspective view showing the entire configuration of a general drum-type washing machine.

FIG. 5 is a partially cut-away side view showing the entire configuration of a general drum-type washing machine.

FIG. 6 is a view showing a mounting structure of a bearing by a conventional drum type washing machine.

[Explanation of symbols]

 Reference Signs List 6 outer tank 6a side peripheral plate 6b rear plate 13 bearing 13a arm 13b first notch 13c notch groove 13d recess 13e second notch 31 bolt 32 contact metal 33 nut 34 Washers

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoki Hayashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A drum type washing machine having a structure in which a horizontal shaft is fixed to a rear surface of a cylindrical drum and the horizontal shaft is rotatably supported by a bearing attached to a rear surface of an outer tub in which the drum is mounted. A mounting structure for fixing a bearing member having an arm extending from a shaft center toward an outer periphery to a rear surface of a drum or an outer tub, wherein a rear edge of a side peripheral plate extending rearward from a rear end surface of the drum or the outer tub. At the end of the arm of the bearing member is formed a bearing mounting margin that is in contact with the inner periphery of the mounting margin, and a mounting margin is formed at the end of the arm of the bearing member. A notch opened rearward is formed at a position corresponding to the hole, and a bolt penetrating the hole from outside the outer peripheral plate of the outer tank or the drum is passed through the notch, and the bolt is formed on the inner peripheral side of the notch. Nut and the bolt Drum type washing machine is characterized in that fixing a white bearing mounting and mounting Kido by tightening with. 2. The bearing mounting margin is provided with a U-shaped first notch on the outermost periphery, a concave portion for accommodating a nut on the inner peripheral side, and a bolt protruding from the nut on the inner peripheral side. The drum-type washing machine according to claim 1, further comprising a second notch opened rearward for supporting the screw portion of (1). 3. A drum type washing machine having a structure in which a horizontal shaft is fixed to a rear surface of a cylindrical drum, and the horizontal shaft is rotatably supported by a bearing attached to a rear surface of an outer tub in which the drum is mounted. A mounting structure for fixing a bearing member having an arm extending from a shaft center toward an outer periphery to a rear surface of a drum or an outer tub, wherein a rear edge of a side peripheral plate extending rearward from a rear end surface of the drum or the outer tub. At the end of the arm of the bearing member is formed a bearing mounting margin in contact with the inner periphery of the mounting margin, while a mounting margin having an opening at a predetermined position of the end is formed. A U-shaped notch that opens forward at a position corresponding to the hole, and an upright wall portion that closes the front of the notch inside the notch and opens rearward, and has a side peripheral plate of an outer tank or a drum. Bolt from the outside Serial through the cut, the drum type washing machine, characterized in that fixing a white bearing mounting and mounting Kido by tightening the screwed nut and the bolt to the bolt inside the notch.